27 research outputs found

    Supercontinuum generation from 1.35 to 1.7 mu m by nanosecond pumping near the second zero-dispersion wavelength of a microstructured fiber

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    International audienceWe experimentally study a new regime for supercontinuum (SC) generation in the nanosecond pulsed regime using a nucrostructured optical fiber with two zero-dispersion wavelengths (ZDWs). Pumping at 1535 nm around the second ZDW yields a nearly flat SC over 1350-1700 nm. The interplay between the effects of modulation instability and stimulated Raman scattering are described through simple phase-matching relations

    Low-threshold all-fiber 1000 nm supercontinuum source based on highly nonlinear fiber

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    International audienceWe present an highly efficient all-fiber compact supercontinuum source that exhibits a nearly flat spectrum from 1.1 ÎĽm to 2.1 ÎĽm. This broadband infrared optical source is made-up of a highly non-linear fiber pumped by a 1.55 ÎĽm self-Q-switched Er-Brillouin nanosecond pulsed fiber laser, which in turn is pumped by a low-power 1480 nm laser diode. In this work we highlight the great potential of highly non-linear fiber for supercontinuum generation with respect to conventional dispersion-shifted fiber by demonstrating a significant 10 dB power enhancement in the short wavelength side of the supercontinuum

    Interplay of four-wave mixing processes with a mixed coherent-incoherent pump

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    We experimentally demonstrate the existence of multiple, simultaneous, independent four-wave mixing processes in optical fibers. In particular we observe competition between phase-matched and non-phasematched processes involving the same mixed coherent-incoherent pump. Further investigation reveals that narrow-band degenerate four-wave mixing with an incoherent pump can lead to efficient wavelength conversion
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